| 摘要 |
PROBLEM TO BE SOLVED: To provide a service switching method by which a VolP service and a PSTN service are simply and automatically switched therebetween. SOLUTION: The service switching method comprises steps of: providing a time division data bus equipped with a plurality of time slots, receiving a telephone number via a user interface module, judging, based on the telephone number, whether a required service is a first service or not, assigning a first time slot to the user interface module and a first processing module if the required service is the first service, and receiving and transmitting data through the time division data bus by the user interface module and a first processing module based on the first time slot. COPYRIGHT: (C)2008,JPO&INPIT
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